./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0edc3db25587eb2dcb44164977e2a8fa1ed85700 ............................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0edc3db25587eb2dcb44164977e2a8fa1ed85700 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:56:13,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:56:13,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:56:13,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:56:13,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:56:13,268 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:56:13,270 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:56:13,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:56:13,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:56:13,277 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:56:13,278 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:56:13,280 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:56:13,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:56:13,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:56:13,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:56:13,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:56:13,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:56:13,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:56:13,306 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:56:13,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:56:13,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:56:13,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:56:13,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:56:13,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:56:13,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:56:13,343 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:56:13,343 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:56:13,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:56:13,347 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:56:13,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:56:13,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:56:13,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:56:13,352 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:56:13,354 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:56:13,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:56:13,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:56:13,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:56:13,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:56:13,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:56:13,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:56:13,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:56:13,362 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 06:56:13,422 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:56:13,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:56:13,424 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:56:13,424 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:56:13,424 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:56:13,425 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:56:13,425 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 06:56:13,425 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:56:13,433 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:56:13,433 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 06:56:13,434 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 06:56:13,435 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:56:13,435 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 06:56:13,435 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 06:56:13,436 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 06:56:13,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:56:13,437 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:56:13,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 06:56:13,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:56:13,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:56:13,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:56:13,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:56:13,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:56:13,439 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:56:13,439 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:56:13,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:56:13,439 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:56:13,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:56:13,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:56:13,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:56:13,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:56:13,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:56:13,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:56:13,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:56:13,442 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 06:56:13,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 06:56:13,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:56:13,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:56:13,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:56:13,443 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0edc3db25587eb2dcb44164977e2a8fa1ed85700 [2021-10-13 06:56:13,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:56:13,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:56:13,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:56:13,777 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:56:13,778 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:56:13,779 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-acceleration/array_1-2.c [2021-10-13 06:56:13,871 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/data/2805a8410/f7925fe21a754200a37e5ab6830a0baa/FLAG6ad9e9f4a [2021-10-13 06:56:14,435 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:56:14,437 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/sv-benchmarks/c/loop-acceleration/array_1-2.c [2021-10-13 06:56:14,450 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/data/2805a8410/f7925fe21a754200a37e5ab6830a0baa/FLAG6ad9e9f4a [2021-10-13 06:56:14,776 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/data/2805a8410/f7925fe21a754200a37e5ab6830a0baa [2021-10-13 06:56:14,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:56:14,781 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:56:14,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:56:14,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:56:14,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:56:14,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:56:14" (1/1) ... [2021-10-13 06:56:14,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15d2f4d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:14, skipping insertion in model container [2021-10-13 06:56:14,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:56:14" (1/1) ... [2021-10-13 06:56:14,802 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:56:14,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:56:15,021 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/sv-benchmarks/c/loop-acceleration/array_1-2.c[321,334] [2021-10-13 06:56:15,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:56:15,055 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:56:15,069 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/sv-benchmarks/c/loop-acceleration/array_1-2.c[321,334] [2021-10-13 06:56:15,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:56:15,089 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:56:15,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:15 WrapperNode [2021-10-13 06:56:15,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:56:15,093 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:56:15,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:56:15,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:56:15,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:15" (1/1) ... [2021-10-13 06:56:15,110 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:15" (1/1) ... [2021-10-13 06:56:15,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:56:15,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:56:15,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:56:15,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:56:15,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:15" (1/1) ... [2021-10-13 06:56:15,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:15" (1/1) ... [2021-10-13 06:56:15,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:15" (1/1) ... [2021-10-13 06:56:15,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:15" (1/1) ... [2021-10-13 06:56:15,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:15" (1/1) ... [2021-10-13 06:56:15,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:15" (1/1) ... [2021-10-13 06:56:15,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:15" (1/1) ... [2021-10-13 06:56:15,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:56:15,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:56:15,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:56:15,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:56:15,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:15" (1/1) ... [2021-10-13 06:56:15,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:56:15,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:56:15,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:56:15,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:56:15,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 06:56:15,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:56:15,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:56:15,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 06:56:15,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 06:56:15,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:56:15,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 06:56:15,659 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:56:15,659 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 06:56:15,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:56:15 BoogieIcfgContainer [2021-10-13 06:56:15,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:56:15,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:56:15,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:56:15,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:56:15,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:56:14" (1/3) ... [2021-10-13 06:56:15,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60a0bc7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:56:15, skipping insertion in model container [2021-10-13 06:56:15,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:15" (2/3) ... [2021-10-13 06:56:15,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60a0bc7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:56:15, skipping insertion in model container [2021-10-13 06:56:15,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:56:15" (3/3) ... [2021-10-13 06:56:15,680 INFO L111 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2021-10-13 06:56:15,687 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:56:15,687 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 06:56:15,802 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:56:15,815 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 06:56:15,816 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 06:56:15,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:56:15,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 06:56:15,839 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:56:15,840 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 06:56:15,840 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:56:15,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:56:15,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1912039, now seen corresponding path program 1 times [2021-10-13 06:56:15,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:56:15,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318372214] [2021-10-13 06:56:15,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:56:15,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:56:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:56:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:56:16,136 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:56:16,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318372214] [2021-10-13 06:56:16,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318372214] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:56:16,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:56:16,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 06:56:16,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378550229] [2021-10-13 06:56:16,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 06:56:16,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:56:16,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 06:56:16,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:56:16,182 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:56:16,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:56:16,219 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-10-13 06:56:16,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 06:56:16,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 06:56:16,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:56:16,231 INFO L225 Difference]: With dead ends: 13 [2021-10-13 06:56:16,232 INFO L226 Difference]: Without dead ends: 6 [2021-10-13 06:56:16,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 06:56:16,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-10-13 06:56:16,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-10-13 06:56:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:56:16,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-10-13 06:56:16,272 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-10-13 06:56:16,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:56:16,273 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-10-13 06:56:16,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:56:16,274 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-10-13 06:56:16,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 06:56:16,275 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:56:16,275 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 06:56:16,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 06:56:16,276 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:56:16,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:56:16,281 INFO L82 PathProgramCache]: Analyzing trace with hash 59140550, now seen corresponding path program 1 times [2021-10-13 06:56:16,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:56:16,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842382200] [2021-10-13 06:56:16,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:56:16,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:56:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:56:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:56:16,351 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:56:16,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842382200] [2021-10-13 06:56:16,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842382200] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 06:56:16,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96599763] [2021-10-13 06:56:16,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:56:16,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:56:16,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:56:16,355 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:56:16,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 06:56:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:56:16,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:56:16,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:56:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:56:16,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:56:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:56:16,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96599763] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:56:16,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1068829635] [2021-10-13 06:56:16,598 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-13 06:56:16,599 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 06:56:16,604 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 06:56:16,611 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 06:56:16,611 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 06:56:16,650 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:56:16,656 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:56:16,657 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:56:16,658 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-10-13 06:56:16,663 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:56:16,665 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:56:16,667 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-10-13 06:56:16,673 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 155 [2021-10-13 06:56:16,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:56:16,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:56:16,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:56:16,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:56:16,925 INFO L354 Elim1Store]: treesize reduction 141, result has 10.2 percent of original size [2021-10-13 06:56:16,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 63 treesize of output 62 [2021-10-13 06:56:16,929 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:56:16,935 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-10-13 06:56:16,938 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:56:16,940 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-10-13 06:56:16,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 06:56:16,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:56:17,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:56:17,007 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:56:17,012 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 133 [2021-10-13 06:56:17,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 06:56:17,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:152, output treesize:133 [2021-10-13 06:56:17,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-13 06:56:17,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:56:17,232 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_13| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 06:56:17,235 INFO L168 Benchmark]: Toolchain (without parser) took 2453.96 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 75.3 MB in the beginning and 103.5 MB in the end (delta: -28.2 MB). Peak memory consumption was 45.0 MB. Max. memory is 16.1 GB. [2021-10-13 06:56:17,236 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 111.1 MB. Free memory was 84.4 MB in the beginning and 84.4 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:56:17,237 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.19 ms. Allocated memory is still 111.1 MB. Free memory was 75.0 MB in the beginning and 85.8 MB in the end (delta: -10.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 06:56:17,237 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.03 ms. Allocated memory is still 111.1 MB. Free memory was 85.5 MB in the beginning and 84.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:56:17,238 INFO L168 Benchmark]: Boogie Preprocessor took 46.66 ms. Allocated memory is still 111.1 MB. Free memory was 84.3 MB in the beginning and 82.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:56:17,239 INFO L168 Benchmark]: RCFGBuilder took 481.35 ms. Allocated memory is still 111.1 MB. Free memory was 82.8 MB in the beginning and 72.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 06:56:17,239 INFO L168 Benchmark]: TraceAbstraction took 1569.81 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 71.7 MB in the beginning and 103.5 MB in the end (delta: -31.7 MB). Peak memory consumption was 43.7 MB. Max. memory is 16.1 GB. [2021-10-13 06:56:17,253 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 111.1 MB. Free memory was 84.4 MB in the beginning and 84.4 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 307.19 ms. Allocated memory is still 111.1 MB. Free memory was 75.0 MB in the beginning and 85.8 MB in the end (delta: -10.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.03 ms. Allocated memory is still 111.1 MB. Free memory was 85.5 MB in the beginning and 84.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.66 ms. Allocated memory is still 111.1 MB. Free memory was 84.3 MB in the beginning and 82.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 481.35 ms. Allocated memory is still 111.1 MB. Free memory was 82.8 MB in the beginning and 72.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1569.81 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 71.7 MB in the beginning and 103.5 MB in the end (delta: -31.7 MB). Peak memory consumption was 43.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_13| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_13|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 06:56:17,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:56:20,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:56:20,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:56:20,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:56:20,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:56:20,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:56:20,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:56:20,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:56:20,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:56:20,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:56:20,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:56:20,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:56:20,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:56:20,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:56:20,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:56:20,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:56:20,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:56:20,170 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:56:20,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:56:20,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:56:20,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:56:20,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:56:20,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:56:20,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:56:20,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:56:20,191 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:56:20,192 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:56:20,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:56:20,194 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:56:20,195 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:56:20,196 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:56:20,197 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:56:20,198 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:56:20,199 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:56:20,201 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:56:20,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:56:20,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:56:20,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:56:20,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:56:20,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:56:20,206 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:56:20,207 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 06:56:20,238 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:56:20,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:56:20,240 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:56:20,240 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:56:20,240 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:56:20,240 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:56:20,241 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:56:20,241 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:56:20,241 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:56:20,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:56:20,247 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:56:20,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:56:20,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:56:20,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:56:20,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:56:20,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:56:20,249 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:56:20,249 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 06:56:20,249 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 06:56:20,249 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:56:20,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:56:20,250 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:56:20,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:56:20,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:56:20,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 06:56:20,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:56:20,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:56:20,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:56:20,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:56:20,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:56:20,251 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 06:56:20,252 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 06:56:20,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:56:20,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:56:20,253 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:56:20,253 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0edc3db25587eb2dcb44164977e2a8fa1ed85700 [2021-10-13 06:56:20,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:56:20,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:56:20,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:56:20,770 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:56:20,771 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:56:20,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-acceleration/array_1-2.c [2021-10-13 06:56:20,871 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/data/4db462465/8a6b93de591a44fc9ebeded20c0e3d48/FLAGa11993b69 [2021-10-13 06:56:21,414 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:56:21,414 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/sv-benchmarks/c/loop-acceleration/array_1-2.c [2021-10-13 06:56:21,421 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/data/4db462465/8a6b93de591a44fc9ebeded20c0e3d48/FLAGa11993b69 [2021-10-13 06:56:21,794 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/data/4db462465/8a6b93de591a44fc9ebeded20c0e3d48 [2021-10-13 06:56:21,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:56:21,809 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:56:21,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:56:21,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:56:21,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:56:21,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:56:21" (1/1) ... [2021-10-13 06:56:21,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@85cbb1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:21, skipping insertion in model container [2021-10-13 06:56:21,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:56:21" (1/1) ... [2021-10-13 06:56:21,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:56:21,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:56:22,078 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/sv-benchmarks/c/loop-acceleration/array_1-2.c[321,334] [2021-10-13 06:56:22,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:56:22,105 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:56:22,140 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/sv-benchmarks/c/loop-acceleration/array_1-2.c[321,334] [2021-10-13 06:56:22,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:56:22,185 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:56:22,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:22 WrapperNode [2021-10-13 06:56:22,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:56:22,186 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:56:22,187 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:56:22,187 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:56:22,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:22" (1/1) ... [2021-10-13 06:56:22,202 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:22" (1/1) ... [2021-10-13 06:56:22,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:56:22,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:56:22,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:56:22,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:56:22,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:22" (1/1) ... [2021-10-13 06:56:22,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:22" (1/1) ... [2021-10-13 06:56:22,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:22" (1/1) ... [2021-10-13 06:56:22,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:22" (1/1) ... [2021-10-13 06:56:22,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:22" (1/1) ... [2021-10-13 06:56:22,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:22" (1/1) ... [2021-10-13 06:56:22,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:22" (1/1) ... [2021-10-13 06:56:22,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:56:22,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:56:22,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:56:22,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:56:22,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:22" (1/1) ... [2021-10-13 06:56:22,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:56:22,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:56:22,294 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:56:22,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:56:22,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 06:56:22,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:56:22,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 06:56:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:56:22,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:56:22,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 06:56:22,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 06:56:22,652 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:56:22,653 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 06:56:22,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:56:22 BoogieIcfgContainer [2021-10-13 06:56:22,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:56:22,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:56:22,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:56:22,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:56:22,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:56:21" (1/3) ... [2021-10-13 06:56:22,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5948a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:56:22, skipping insertion in model container [2021-10-13 06:56:22,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:56:22" (2/3) ... [2021-10-13 06:56:22,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5948a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:56:22, skipping insertion in model container [2021-10-13 06:56:22,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:56:22" (3/3) ... [2021-10-13 06:56:22,664 INFO L111 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2021-10-13 06:56:22,670 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:56:22,671 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 06:56:22,726 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:56:22,734 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 06:56:22,735 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 06:56:22,751 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:56:22,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 06:56:22,757 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:56:22,758 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 06:56:22,759 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:56:22,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:56:22,774 INFO L82 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2021-10-13 06:56:22,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:56:22,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246976354] [2021-10-13 06:56:22,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:56:22,790 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:56:22,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:56:22,795 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:56:22,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 06:56:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:56:22,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:56:22,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:56:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:56:23,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:56:23,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:56:23,090 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:56:23,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246976354] [2021-10-13 06:56:23,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246976354] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:56:23,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:56:23,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 06:56:23,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435587045] [2021-10-13 06:56:23,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:56:23,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:56:23,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:56:23,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:56:23,144 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:56:23,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:56:23,228 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-10-13 06:56:23,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:56:23,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 06:56:23,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:56:23,246 INFO L225 Difference]: With dead ends: 23 [2021-10-13 06:56:23,255 INFO L226 Difference]: Without dead ends: 11 [2021-10-13 06:56:23,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:56:23,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-13 06:56:23,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-13 06:56:23,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:56:23,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-10-13 06:56:23,302 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2021-10-13 06:56:23,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:56:23,302 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-10-13 06:56:23,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:56:23,303 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-10-13 06:56:23,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 06:56:23,304 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:56:23,305 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 06:56:23,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:56:23,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:56:23,520 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:56:23,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:56:23,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1489078833, now seen corresponding path program 1 times [2021-10-13 06:56:23,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:56:23,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061870111] [2021-10-13 06:56:23,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:56:23,523 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:56:23,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:56:23,528 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:56:23,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 06:56:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:56:23,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 06:56:23,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:56:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:56:23,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:56:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:56:23,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:56:23,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061870111] [2021-10-13 06:56:23,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061870111] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:56:23,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1541004664] [2021-10-13 06:56:23,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:56:23,813 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:56:23,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:56:23,825 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:56:23,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-10-13 06:56:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:56:23,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 06:56:23,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:56:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:56:24,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:56:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:56:24,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1541004664] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:56:24,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350705959] [2021-10-13 06:56:24,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:56:24,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:56:24,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:56:24,119 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:56:24,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 06:56:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:56:24,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 06:56:24,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:56:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:56:24,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:56:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:56:24,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350705959] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:56:24,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:56:24,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-10-13 06:56:24,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407689035] [2021-10-13 06:56:24,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 06:56:24,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:56:24,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 06:56:24,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 06:56:24,361 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:56:24,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:56:24,503 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-10-13 06:56:24,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 06:56:24,505 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 06:56:24,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:56:24,506 INFO L225 Difference]: With dead ends: 23 [2021-10-13 06:56:24,506 INFO L226 Difference]: Without dead ends: 19 [2021-10-13 06:56:24,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-13 06:56:24,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-13 06:56:24,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-13 06:56:24,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:56:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-10-13 06:56:24,516 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2021-10-13 06:56:24,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:56:24,517 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-10-13 06:56:24,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:56:24,518 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-10-13 06:56:24,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 06:56:24,520 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:56:24,521 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-10-13 06:56:24,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-10-13 06:56:24,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-13 06:56:24,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-13 06:56:25,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:56:25,125 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:56:25,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:56:25,126 INFO L82 PathProgramCache]: Analyzing trace with hash -690462407, now seen corresponding path program 2 times [2021-10-13 06:56:25,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:56:25,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029180310] [2021-10-13 06:56:25,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:56:25,128 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:56:25,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:56:25,135 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:56:25,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 06:56:25,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 06:56:25,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:56:25,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 06:56:25,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:56:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:56:25,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:56:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:56:25,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:56:25,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029180310] [2021-10-13 06:56:25,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029180310] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:56:25,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [200851436] [2021-10-13 06:56:25,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:56:25,733 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:56:25,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:56:25,744 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:56:25,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 06:56:25,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 06:56:25,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:56:25,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 06:56:25,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:56:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:56:25,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:56:26,056 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:56:26,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [200851436] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:56:26,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493148514] [2021-10-13 06:56:26,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:56:26,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:56:26,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:56:26,058 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:56:26,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 06:56:26,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 06:56:26,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:56:26,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 06:56:26,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:56:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:56:26,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:56:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:56:26,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493148514] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:56:26,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:56:26,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-10-13 06:56:26,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733439] [2021-10-13 06:56:26,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 06:56:26,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:56:26,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 06:56:26,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-13 06:56:26,386 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:56:26,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:56:26,909 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-10-13 06:56:26,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 06:56:26,910 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 06:56:26,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:56:26,911 INFO L225 Difference]: With dead ends: 39 [2021-10-13 06:56:26,911 INFO L226 Difference]: Without dead ends: 35 [2021-10-13 06:56:26,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 547.9ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-13 06:56:26,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-13 06:56:26,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-10-13 06:56:26,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:56:26,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-10-13 06:56:26,920 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 18 [2021-10-13 06:56:26,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:56:26,921 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-10-13 06:56:26,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:56:26,921 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-10-13 06:56:26,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 06:56:26,923 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:56:26,923 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2021-10-13 06:56:26,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-10-13 06:56:27,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 06:56:27,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 06:56:27,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:56:27,544 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:56:27,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:56:27,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1155303607, now seen corresponding path program 3 times [2021-10-13 06:56:27,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:56:27,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302140944] [2021-10-13 06:56:27,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 06:56:27,546 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:56:27,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:56:27,547 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:56:27,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 06:56:27,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 06:56:27,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:56:27,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 06:56:27,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:56:27,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 06:56:28,102 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-10-13 06:56:28,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 34 [2021-10-13 06:56:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-10-13 06:56:28,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:56:28,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-10-13 06:56:28,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2021-10-13 06:56:28,418 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-10-13 06:56:28,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:56:28,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302140944] [2021-10-13 06:56:28,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302140944] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:56:28,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:56:28,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2021-10-13 06:56:28,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350729110] [2021-10-13 06:56:28,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 06:56:28,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:56:28,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 06:56:28,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-13 06:56:28,423 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:56:28,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:56:28,752 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-10-13 06:56:28,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 06:56:28,752 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 06:56:28,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:56:28,753 INFO L225 Difference]: With dead ends: 35 [2021-10-13 06:56:28,753 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 06:56:28,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 417.1ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-10-13 06:56:28,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 06:56:28,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 06:56:28,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:56:28,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 06:56:28,755 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2021-10-13 06:56:28,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:56:28,755 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 06:56:28,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:56:28,755 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 06:56:28,755 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 06:56:28,758 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 06:56:28,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 06:56:28,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:56:28,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 06:56:28,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:56:29,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:56:29,110 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 06:56:29,110 INFO L857 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-10-13 06:56:29,110 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 06:56:29,110 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 06:56:29,110 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 06:56:29,110 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-10-13 06:56:29,110 INFO L857 garLoopResultBuilder]: For program point L16-2(lines 16 18) no Hoare annotation was computed. [2021-10-13 06:56:29,111 INFO L853 garLoopResultBuilder]: At program point L16-3(lines 16 18) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~#A~0.offset| (_ bv0 32)))) (or (and (= ULTIMATE.start_main_~i~0 (_ bv0 32)) .cse0) (and .cse0 (= (bvadd (select (select |#memory_int| |ULTIMATE.start_main_~#A~0.base|) (bvadd (_ bv4294967292 32) |ULTIMATE.start_main_~#A~0.offset| (bvmul ULTIMATE.start_main_~i~0 (_ bv4 32)))) (_ bv1 32)) ULTIMATE.start_main_~i~0) (bvslt (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~i~0) (_ bv1024 32))))) [2021-10-13 06:56:29,111 INFO L857 garLoopResultBuilder]: For program point L16-4(lines 16 18) no Hoare annotation was computed. [2021-10-13 06:56:29,111 INFO L857 garLoopResultBuilder]: For program point L12(lines 12 21) no Hoare annotation was computed. [2021-10-13 06:56:29,111 INFO L857 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-10-13 06:56:29,111 INFO L860 garLoopResultBuilder]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2021-10-13 06:56:29,115 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 06:56:29,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 06:56:29 BoogieIcfgContainer [2021-10-13 06:56:29,129 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 06:56:29,130 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 06:56:29,130 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 06:56:29,131 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 06:56:29,131 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:56:22" (3/4) ... [2021-10-13 06:56:29,134 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 06:56:29,145 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-13 06:56:29,145 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 06:56:29,145 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-13 06:56:29,146 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 06:56:29,205 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 06:56:29,206 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 06:56:29,207 INFO L168 Benchmark]: Toolchain (without parser) took 7397.20 ms. Allocated memory was 75.5 MB in the beginning and 100.7 MB in the end (delta: 25.2 MB). Free memory was 40.9 MB in the beginning and 65.1 MB in the end (delta: -24.2 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. [2021-10-13 06:56:29,208 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 75.5 MB. Free memory is still 57.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:56:29,213 INFO L168 Benchmark]: CACSL2BoogieTranslator took 371.85 ms. Allocated memory is still 75.5 MB. Free memory was 40.7 MB in the beginning and 59.1 MB in the end (delta: -18.4 MB). Peak memory consumption was 6.2 MB. Max. memory is 16.1 GB. [2021-10-13 06:56:29,214 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.69 ms. Allocated memory is still 75.5 MB. Free memory was 59.1 MB in the beginning and 57.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:56:29,214 INFO L168 Benchmark]: Boogie Preprocessor took 29.07 ms. Allocated memory is still 75.5 MB. Free memory was 57.7 MB in the beginning and 56.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:56:29,215 INFO L168 Benchmark]: RCFGBuilder took 401.44 ms. Allocated memory is still 75.5 MB. Free memory was 56.5 MB in the beginning and 46.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 06:56:29,218 INFO L168 Benchmark]: TraceAbstraction took 6472.51 ms. Allocated memory was 75.5 MB in the beginning and 100.7 MB in the end (delta: 25.2 MB). Free memory was 46.5 MB in the beginning and 68.0 MB in the end (delta: -21.6 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2021-10-13 06:56:29,218 INFO L168 Benchmark]: Witness Printer took 75.76 ms. Allocated memory is still 100.7 MB. Free memory was 68.0 MB in the beginning and 65.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 06:56:29,221 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 75.5 MB. Free memory is still 57.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 371.85 ms. Allocated memory is still 75.5 MB. Free memory was 40.7 MB in the beginning and 59.1 MB in the end (delta: -18.4 MB). Peak memory consumption was 6.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.69 ms. Allocated memory is still 75.5 MB. Free memory was 59.1 MB in the beginning and 57.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.07 ms. Allocated memory is still 75.5 MB. Free memory was 57.7 MB in the beginning and 56.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 401.44 ms. Allocated memory is still 75.5 MB. Free memory was 56.5 MB in the beginning and 46.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6472.51 ms. Allocated memory was 75.5 MB in the beginning and 100.7 MB in the end (delta: 25.2 MB). Free memory was 46.5 MB in the beginning and 68.0 MB in the end (delta: -21.6 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. * Witness Printer took 75.76 ms. Allocated memory is still 100.7 MB. Free memory was 68.0 MB in the beginning and 65.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6391.2ms, OverallIterations: 4, TraceHistogramMax: 14, EmptinessCheckTime: 16.4ms, AutomataDifference: 1175.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 148.4ms, InitialAbstractionConstructionTime: 11.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 24 SDtfs, 30 SDslu, 61 SDs, 0 SdLazy, 197 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 350.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 244 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1099.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=3, InterpolantAutomatonStates: 36, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 41.5ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 17 NumberOfFragments, 32 HoareAnnotationTreeSize, 2 FomulaSimplifications, 390 FormulaSimplificationTreeSizeReduction, 68.3ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 28 FormulaSimplificationTreeSizeReductionInter, 73.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 116.6ms SsaConstructionTime, 268.6ms SatisfiabilityAnalysisTime, 2245.1ms InterpolantComputationTime, 124 NumberOfCodeBlocks, 100 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 232 ConstructedInterpolants, 1 QuantifiedInterpolants, 708 SizeOfPredicates, 16 NumberOfNonLiveVariables, 350 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 392/632 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: (i == 0bv32 && A == 0bv32) || ((A == 0bv32 && ~bvadd64(unknown-#memory_int-unknown[A][~bvadd64(4294967292bv32, A, ~bvmul32(i, 4bv32))], 1bv32) == i) && ~bvslt32(~bvadd64(4294967295bv32, i), 1024bv32)) RESULT: Ultimate proved your program to be correct! [2021-10-13 06:56:29,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13088bd8-041f-4210-9aa4-3aab7f9fd763/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...